Write the correct number in the given boxes from the following A.P.
3,6,9,12,…….
Here `t_(1)=square, t_(2)=square, t_(3)=square, t_(4)=square, t_(2)-t_(1) = square, t_(3)-t_(2) = square therefore d=square`

Answer

`t_(1)=3, t_(2)=6, t_(3)=9, t_(4)=12`,…………
`t_(2)-t_(1)=3, t_(3)-t_(2)=3, therefore d=3`